[office/kmymoney] doc: Add missing condition for deleting a category

[Dawid Wróbel]

Git commit 60ab5d8d330992df039246e166cd11ebe1b1da8b by Dawid Wróbel, on behalf of Paul Worrall.
Committed on 28/09/2022 at 15:23.
Pushed by wrobelda into branch 'master'.

Add missing condition for deleting a category

Update to doc/details-categories.docbook to add an additional condition
that has to be met before a category can be deleted.

BUG: 432897

M  +2    -1    doc/details-categories.docbook

https://invent.kde.org/office/kmymoney/commit/60ab5d8d330992df039246e166cd11ebe1b1da8b

diff --git a/doc/details-categories.docbook b/doc/details-categories.docbook
index 80bb39485..57480ec78 100644
--- a/doc/details-categories.docbook
+++ b/doc/details-categories.docbook
@@ -144,7 +144,8 @@
 <para>
   To delete a category, select it in the tree, right click to bring up the popup
   menu, and select <guimenuitem>Delete</guimenuitem>.  If the category has no
-  transactions, schedules, or budgets associated with it, it will be deleted.
+  transactions, schedules, or budgets associated with it, and it is not set as the
+  default category for new transactions with any payee, it will be deleted.
 </para>
 
 <para>